See the 'Sisters For Sale' trailer in English, Español, Français or Deutsch.
In 2010, I was teaching English in Sapa, in northern Vietnam.
I made friends amongst the local Hmong community, including two 14-year-old girls named May and Pang.
The next year, May and Pang were both kidnapped in separate incidents.
With the one-child policy leaving a shortage of women in China, kidnappings in the region are shockingly common.
Born into poverty along the Chinese border, with low levels of education, a strongly male-dominated culture and a violent custom of marriage by abduction, these Hmong girls are especially vulnerable.